Patek Philippe Perpetual Calendar Chronograph 3970EP

In the world of fine watchmaking, few creations embody the spirit of mechanical mastery and enduring elegance quite like the perpetual calendar chronograph. 

It is a complication reserved for the most esteemed maisons — and in this realm, Patek Philippe stands unrivalled. Introduced in 1986, the reference 3970 succeeded the legendary reference 2499, a model hailed as one of the most iconic and collectible watches of the 20th century. With the 3970, Patek Philippe did not merely continue a legacy — it elevated it.

This particular piece, the reference 3970EP, is part of the fourth and final series, crafted in 1996 and housed in the most precious of metals — platinum (E for étanche, or water-resistant; P for platinum). As a fourth series 3970EP, this watch represents the culmination of a lineage — a clean and contemporary font, perfectly refined sub-dials and elegant hands. It is the final and most refined expression of one of Patek Philippe’s most beloved models. 

What sets this example apart is not only its pedigree, but its impeccable condition. The 36 mm case remains crisp and full, with beautifully defined lines, hallmarks, and satin and mirror finishes. The original pump pushers are sharp and responsive, and the sapphire case back reveals a pristine, hand-finished CH 27-70 Q manual-winding movement — a horological marvel based on the Lemania 2310 and brought to life with Patek Philippe’s legendary artisanal finishing.

The opaline silver dial is flawlessly preserved, displaying applied baton hour markers and slender feuille hands, all in perfect harmony. At 12 o’clock, twin apertures showcase the day and month (in English), while the other sub dials offer:

• At 9 o’clock, running seconds and a 24-hour indicator.

• At 3 o’clock, a 30-minute chronograph counter and a leap year indicator.

• At 6 o’clock, a romantic moon phase surrounded by a date ring.

The watch is presented on a hand-stitched black alligator leather strap, secured by a platinum Patek Philippe deployant clasp, and is accompanied by an official Extract from the Archives, confirming its production in 1996.

The 3970EP is an icon, blending technical brilliance, aesthetic purity, and horological heritage.